| Standard: | ASTM, AISI, GB, JIS, DIN, EN |
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| Grade: | 300 Series |
| Certification: | ISO |
| Shape: | Sheet |
| Technique: | Cold Rolled |
| Certificates: | SGS, TUV and Mtc |
| Samples: |
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| Customization: |
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Audited Supplier 300 Series stainless steels are classified as austenitic, and are hardenable only by cold working methods. These grades of stainless have chromium (approx. 18 to 30%) and nickel (approx. 6 to 20%) as their major alloying additions. Type 304 is the most widely used alloy of all stainless steels. 300 Series Stainless steel alloys resist corrosion, maintain their strength at high temperatures and are easy to maintain.
Type 316/316L is a chromium nickel austenitic stainless steel containing molybdenum. The molybdenum addition enhances the corrosion resistance over that of 304/304L in halide environments as well as in reducing acids such as sulfuric and phosphoric acid. Type 316L can be dual certified as 316 when the composition meets the lower carbon limit of 316L and the slightly higher strength levels of 316. Type 316L should be specified for welded applications as the low carbon version eliminates chromium carbide precipitation and enhances the corrosion resistance in the as-welded condition.
Type 316/316L resists atmospheric corrosion as well as in moderately oxidizing environments. It also resists corrosion in marine atmospheres and has excellent resistance to intergranular corrosion in the as-welded condition. Type 316/316L has excellent strength and toughness at cryogenic temperatures. Type 316/316L is non-magnetic in the annealed condition but may become slightly magnetic as a result of severe cold working.
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*
| Element | 316 | 316L |
| Carbon | 0.08 | 0.030 max |
| Chromium | 16.0-18.0 | 16.0-18.0 |
| Nickel | 10.0-14.0 | 10.0-14.0 |
| Molybdenum | 2.00-3.00 | 2.00-3.00 |
| Manganese | 2.00 | 2.00 |
| Silicon | 0.75 | 0.75 |
| Nitrogen | 0.10 | 0.10 |
| Phosphorus | 0.045 | 0.045 |
| Sulfur | 0.030 | 0.030 |
| Property | 316 | 316L |
| Yield Strength, min. (ksi) | 30 | 25 |
| Tensile Strength, min. (ksi) | 75 | 70 |
| Elongation, min. (%) | 40 | 40 |
| Hardness, max. (Rb) | 95 | 95 |
| Condition | Yield Strength (ksi) min. | Tensile Strength (ksi) min. | Elongation % min. in 2 in. | |
| <0.015 in. | ≥0.015 in. | |||
| 1/4 Hard | 75 | 125 | 10 | 10 |
| 1/2 Hard | 110 | 150 | 6 | 7 |
| Property | 316/316L Data |
| Density, lb/in3 | 0.290 |
| Modulus of Elasticity, psi | 29.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 9.2 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 9.4 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microohm-in | 29.4 |
Other common Stainless steel 304/304L Grade :
Type 304/304L is the modern version of "18-8" stainless steel containing approximately 18% chromium and 8% nickel and is the most commonly specified stainless steel used throughout the world. Type 304/304L is a versatile, general purpose stainless steel with good resistance to atmospheric corrosion, and to many chemicals and food and beverages. These grades can be specified in the annealed condition where they have very good formability. Higher nickel versions can be specified to enhance multi-stage deep drawing characteristics. Higher strength, cold-worked conditions can also be specified for Type 304/304L for spring type applications. Type 304/304L is non-magnetic in the annealed condition but may become slightly magnetic as a result of cold working.
Type 304L can be dual certified as 304 when the composition meets the lower carbon limit of 304L and the slightly higher strength levels of 304. Type 304L should be specified for welded applications as the low carbon version eliminates chromium carbide precipitation and enhances the corrosion resistance in the as-welded condition.
Alloy 347 is a stabilized, austenitic, chromium steel containing columbium which allows for the elimination of carbide precipitation, and, consequently, intergranualr corrosion. Alloy 347 is stabilized by the additions of chromium and tantalum and offers higher creep and stress rupture properties than alloy 304 and 304L which may also be used for exposures where sensitization and intergranualr corrosion are of concern. The addition of columbium also allows Alloy 347 to have excellent corrosion resistance, even superior to that of alloy 321. 347H is the higher carbon composition form of Alloy 347 and demonstrates improved high temperature and creep properties.
Alloy 321 (UNS S32100) is a titanium stabilized austenitic stainless steel with good general corrosion resistance. It has excellent resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range of 800 - 1500°F (427 - 816°C). The alloy resists oxidation to 1500°F (816°C) and has higher creep and stress rupture properties than alloys 304 and 304L. It also possesses good low temperature toughness.
Alloy 321H (UNS S 32109) is the higher carbon (0.04 - 0.10) version of the alloy. It was developed for enhanced creep resistance and for higher strength at temperatures above 1000oF (537°C). In most instances, the carbon content of the plate enables dual certification.
Alloy 321 cannot be hardened by heat treatment, only by cold working. It can be easily welded and processed by standard shop fabrication practices.
The 309 stainless steel has a higher corrosion resistance and strength compared to 304 stainless steel. This product is versatile and known for its high heat treatment capabilities.Great ductility, weldability, and high-temperature properties make 310 Stainless Steel the ideal choice for projects that require service at temperatures up to 1150 degrees Celsius. Grade 310 resists oxidation and is also used at temperatures up to 1040 degrees Celsius intermittently. Similar to other austenitic steel grades, toughness down to cryogenic temperatures is another feature of 310.
Other common 300series grade 
| Item | Description |
| Standard | ASTM A240 / AISI / DIN / JIS / GB |
Grade |
201/202 |
| 304/304L/304H/309S/310S/316L/316Ti/317L/321//S31803/S32205/904L | |
| 409L/410S/420J1/J2/430 439 441 444 446 | |
| Thickness | 0.3-6.0mm for cold sheet scope; 3.0-100mm for hot rolled scope |
| Width&Length | 1000mm/1219mm/1500mm/1800mm/2000mm |
| Length from cutting, as requirement | |
| Surface | Mill surface: 2B/BA/No.1 |
| Processing surface: 8k mirror/Hairline/No.4 Satin/Bead blast/Color etched | |
| Protection | Transparent film/ Blue fulm/PVC film or laser film |
| Package | Standard export package with metal pallet + angle bar protection + |
| Processing | Edging/Laser(Plasma/Water Jet) cutting/Leveling/Slitting |
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